diff --git a/package.json b/package.json
index 6fdea69..3ed6fcd 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
   "type": "module",
   "packageManager": "pnpm@10.34.1",
   "scripts": {
+    "preinstall": "npx only-allow pnpm",
     "dev": "vite serve --mode development",
     "build:prod": "vite build --mode production",
     "build:dev": "vite build --mode development",